Search academic texts

Information × Registration Number 0224U001747, 0121U001005 , R & D reports Title Theory and methods of nonlinear deformation research and destruction of constructions at their contact interaction with the elastic-plastic environment popup.stage_title Head Solodei Ivan I, Доктор технічних наук Registration Date 28-01-2024 Organization Kyiv National University of Construction and Architecture popup.description2 The problem to be solved by the project is to create a method for constructing computational models of compatible deformation and mutual influence of rigid structures and significantly plastic environment, taking into account the partial discrete and dispersed destruction. The parameters of plastic deformations, stress, displacement, coefficients of approximation of the stress state to the limit are investigated. At the first stage, the main attention is paid to the analysis of existing approaches to the study of nonlinear processes of deformation and destruction of structures of machines and structures during their contact interaction with an elasto-plastic environment. The advantages and limitations of their use are studied. On the basis of the semi-analytical method of finite elements and the special finite elements developed within its framework, solving relations for solving the problems of the interaction of the structure with a nonlinear environment are obtained. At the second stage of research, new algorithms were created for modeling nonlinear processes of interaction of the structure with the soil environment, taking into account the previous stress state, the history of sequential formation and loading of the calculation model. The proposed approaches are implemented in the form of software procedures within the existing computing complex of programs. An analysis of the convergence and reliability of the proposed algorithms was carried out. On the third part, the peculiarities of solving the problems of nonlinear deformation of the soil base are highlighted, a method is developed that allows to reliably model the interaction of structures and structures with an elasto-plastic environment, regardless of the accepted lower limit of the calculation area, a comprehensive verification and approval of the developed methods and algorithms is carried out. The results of solving complex applied problems were obtained. Product Description popup.authors Vabischevych Maksym Karnaukhov Vasiliy Kostina Olena Lukianchenko Olga Pogorelova Olga Solodei Ivan popup.nrat_date 2024-01-28 Close